On the 25th anniversary of the Tiananmen Square crackdown, Beijing police and security personnel were out in force. But in Hong Kong, a large vigil was held in memory of protesters killed in 1989.

This transcript has been automatically generated and may not be 100% accurate.

... the rule ... I the eye ... I ... your for March twenty fifth anniversary of Chinese military led the nineteen eighty nine crackdown on student protesters in Kennett Square where the army violently suppress the vocal pro democracy demonstrators leading to an unknown number of deaths ... it's the government's policy to ban any mention of the anniversary or the crackdown ... which a Chinese foreign Affairs Ministry spokesman on Tuesday refer to as a political incident ... this then extends to the Internet were words and references are scrubbed by the government ... in Beijing on Wednesday visitors continued to know about Tiananmen Square still a popular tourist attraction ... but there was a very tight security presence with scores of police as well as assault teams ready to squash any demonstration ... but in Hong Kong were annual recognition of the crackdown has allowed ... hundreds of thousands of people flooded Victoria Park for a candlelight vigil and speeches ... elsewhere Hong Kong visitors from the mainland came to the small museum dedicated to the nineteen eighty nine crackdown ... the only museum of its kind in China ...